Blano



(No Model.)

3 SheetsSheet 1-. A. F. GOY-BLANO.

STOP WATCH.

No. 356,362. Patented Jan. 1 1887.

N. PETERS, Phclu-Lilhogmpher, wnhzn xon, u.c.

(No Model.)

A P G NO. 3 Sheets-Sheet 2,

STOP WATCH. No. 356,362. Patented Jan. 18,1887.

y lpl. PETERS. Phblolilhogrnpher. Wnshmglon. u, c.

(No Model.) 3 She'ets sheet 3.

A. F. GOY-BLANC.

STOP WATCH.

No. 356,362. Patented Jan. 18, 1887.

UNITED STATES AMI FRANCOIS GOY-BLANG,

PATENT (Enrica.

OF GENEVA, SXVITZERLAND.

STO P-WATCH.

EPBCIFICATIQN forming part of Letters Patent No.356,362, dated January 18, 1387.

Application filed May 1, 1884. Renewed October 21, 1886. Serial No. 216,820.

T0 at whom it may concern:

Be it known that I, AMI Fnanoors GoY- BLANO, a citizen of the Swiss Republic, residing at Geneva, Switzerland, have invented an Improvement in Stop-Vatches, of which the following is a specification.

In this stopwatch there are two hands-one to indicate seconds and the other fifths of secondsand each hand has a separate dial. There is a spring-barrel and train of gearing for actuating the stop mechanism, and a sepa rate spring-barrel and train of gearing for actuating the ordinary time mechanism; but the independent second and fifth-ofseconds hands are governed in their movements by the action of the balance and cscapement wheels of the time mechanism, as hereinafter explained.

In the drawings, Figure 1 is an elevation of the stop watch mechanism without the start ing and stopping levers and cams. Fig. 2 is an elevation of the watch-face, showing the dials and hands. Fig. 3 is a side view, partially in section, and an enlarged size of the stop mechanism detached from the bridges and watch-plates. Fig. 4 is a diagram showing the mechanism for starting, stopping, and returning the hands to 0. i Fig. 5 shows the cam, stop-lever, and stanwheels of the fifth-ofscconds hand, the cam and lever being in position to allow the star-wheels and hand to rotate. Fig. 6 shows the same parts as Fig. 4, but in the position they assume when the iiftl1- of-seconds hand is at 0. Fig. 7 represents the star-wheels, showing the pin and slot for connecting them. Fig. 8 is a section of detached parts of the stop-watch mechanism.

A represents the spring-barrel of the stopwatch mechanism, and from this barrel motion is communicated by the train of gearing a b c d e f to the pinion g.

B indicates the spring-barrel of the ordinary time mechanism of the watch, and thisspring barrel gives motion to the escapement-wheel t" by means of the wheels a o x and pinions on the shaft of saidwvhcels. These two springbarrels and trains of gearing are represented by dotted lines in Fig. 1.

Upon the shaft 2 of the pinion 1 there is fixed a wheel, h, and upon a tubular arbor surrounding saidshaft there is a wheel, This tubular arbor carries the independent second hand Z is a lever carrying the pinion 7c and (No model.)

wheel 7c, and this lever is operated by the cam R, as hereinafter explained, to move it and k into and out of gear with the wheels h and 2', respectively. The wheel h gears into a pinion, m, upon the shaft 3, and fixed to said shaft is a wheel, n,that gears into a pinion, 3), upon a shaft, 4, and to said shaft 4- is secured an arm, q, that is of such length that its outer end, when the arm is rotating, will strike one of the teeth of the piniour, and will be held by said tooth until said tooth moves out of the way, when the arm will make a complete revolution and be detained by the following tooth of the pinion r, and so on.

The pinion 1* is upon the shaft 6, and this shaft carries the escapement-wheel i which latter actuates the balance-wheel i (see Fig. 1,) and the number of teeth of said pinion ris such that the arm q can escape from the teeth of i" once only during every five vibrations of the balance-wheel-that is to say, once every second; hence when the pinion 7c and wheel 7;. are in gear with 7L and 41, respectively, and the arm q and pinion 1) free to rotate, the springbarrel A and gearing gives rotation to gh 70 7t" t and m, a, and p, and for each. complete revolution ofp and q the handx is moved over its dial the distance denoting one second.

Upon a tubular arbor loosely surrounding the shaft 3 is a wheel, 0, and this wheel ois connected to the wheel a by a helical spring, a, one end of the spring being secured to the wheel 0 and the other end to a. The wheel 0 gears into a pinion, s, on the shaft 5, andthis shaft 5 carries the fifthof-seconds hand y.

s s are star-wheels, also upon said shaft 5. s" is firmly secured to said shaft, but 8 is loose thereon, and is revolved. with said shaft by means of a pin, it, on 8 that passes into a slot in 8. (See Figs. 3 and 7.) Each star-wheel has five teeth 5 but one of the teeth of s is longer than its other four teeth, for a purpose hereinafter explained, and the star-wl1eel s is in the same plane as the wheel t, which latter is on the shaft 6 of the escapementwheel t Vhen the arm 1 is released from the pinion r and makes a revolution, as before explained, the partial revolution winds up the spring a the amount necessary for said spring, in unwinding, to rotate the shaft 5, wheels 8 s and hand 3 a complete revolution; but said shaft can only turn as the teeth of t allow the teeth of s to escape successively. The teeth of t are so proportioned that every fifth of a second a tooth of the star-wheel s escapes from t; hence as s has five teeth it and the hand 3 make a complete revolution every second, the hand 3 jumping by fifths of seconds.

To start, stop, and bring the hands 00 y to 0, I make use of the following devices: Thelever Z" is pivoted at 10, and the end of its longer arm is adjacent to a heart-cam, If, that is secured to the tubular arbor of the hand m. The short arm of the lever bears against the cam R, which is provided with projections and depressions, as usual in cams of this character. The shaft 12 of It carries the cams R R also.

Z is a lever, one arm of which bears against R and the other arm has a toothed end, 14, adjacent to the star-wheel s. 1* is also a twoarmed lever, one arm bearing against It", and the outer end of the arm is adjacent to the path of the arm q.

Starting.-XVhen the push-piece d" is pressed upon, it acts upon the ratchet-wheel (Z and partially rotates the cams R R R which in turn actuate the levers, as follows: Z brings the wheels 7; 7t into gear with the wheels h i, Z releases the heart-cam Ir, Z moves out of the path of the arm q, and Z occupies the position shown in Fig. 5; hence the stop-watch mechanism is free to operate and the hands a; and g are moved, as before described.

Stopping.-When the push-piece is pressed upon the second time, the cams R RR and levers are brought to the position shown in Fig. 4, Z having been moved by its spring and disconnected is h from h and t, and the hand or stopped, Z has been moved into the path of and stopped the arm q, and the toothed end 14 of Z" has been moved between two of the teeth of s and thereby stopped its rotation and also the hand 9 Z remains raised.

Returning hands to O.XVhen the push-piece is pressed upon the third time, the cams R R R are turned and the lever Z is brought down by its spring and acts upon the heart-cam It", and brings the hand :0 to 0. The lever Z is moved to the position shown in Fig. 6, with its toothed end 14. in the path of the long tooth of s, and the unwinding of the spring it turns said wheel 8 until its long tooth strikes the tooth 14 of Z when its motion is stopped, as indicated in said Fig. 6, and the hand y is at 0.

In order that the star-wheel s may not stop the wheel t and time mechanism after 8" has been stopped, the slot in s, before referred to, is provided, which slot is of such length that it allows s to be turned by t the distance necessary for t to rotate without striking the teeth of s.

I claim as my invention-- 1. The combination, with the spring-barrels and the stop and time gearing trains, respectively, of the arbor 2 and its pinion g and wheel h, the wheel t and its tubular arbor surrounding the shat't 2, and the hand a", the shaft 3 and its pinion m and wheel a, the shaft 6 and pinion r, the shaft 4, pinion p, and arm q, and means, substantially as specified, forstarting, stopping, and returning the handrc to zero.

2. The combination, with the spring-barrels and the stop and time gearing trains, of the arbor 2 and its pinion g and wheel 71, the wheel 2' and its tubular arbor surrounding the shaft 2, and the hand at, the shaft 3 and its pinion m and wheel a, the wheel 0, loose upon said shaft 3', a helical spring, a, connecting the wheels a and 0, the shaft 6, pinion r, and wheel t, the shaft 4, pinion p, and arm q, the shaft 5, carrying the hand y, the pinion s, and star-wheel s on said shaft 5, and means for starting, stopping, and returning the hands to zero, substantially as specified.

3. The combination, in a stop-watch for indicating seconds and fractions of a second, of the shaft 3 and its pinion m and wheel 11, fast thereon, the wheel 0, loose upon said shaft 3, and the helical spring a, connecting the wheels a and 0, said shaft and parts bein'gin the train of gearing between the arborsof the seconds and fraction-ofseconds hands, substantially as and for the purposes set forth.

AMI FRANCOIS GOY-BLANC.

Vitnesses:

' PETER NAYLOR,

ELiIER SCHNEIDER. 

